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托福阅读精选练习素材:散步可以锻炼大脑

2017-09-22 18:11:57来源:网络

  一篇发表在《神经学》上的研究报告发现,行走的简单动作能够提高老年期的记忆。随着年龄的增长,我们的大脑也会缩小,而缩小的程度是与老年痴呆和认知功能相关的,例如记忆力。为了测试体育运动是否能减轻这些退化因素,匹兹堡大学的研究人员记录下了299位平均年龄78的老年人。参加者的活动范围从每周0到300个街区(最多30公里)。   Nine years later, the walkers underwent brain scans, which revealed that those who had walked more had greater brain volume than those who walked less. Four years after that, the volunteers were tested again — this time for dementia. Among the group, 116 people showed signs of memory loss or dementia. Those who had walked the most — at least 72 city blocks (or about 7 mi.) each week — were half as likely to have cognitive problems as those who walked the least.

  九年后,这些参与者接受脑部扫描,扫描后发现那些走路走得多的人,他们的大脑要比走路少的人要大。又过了四年,参与者有接受了测试,这次是老年痴呆。在这个群体中,有116人记忆力衰退或有老年痴呆。而那些走路走的最多的—至少每周72个街区(大约7公里),只有比那些走路最少的人一半的认知问题。

  The findings are in line with past studies linking physical activity with brain function, but dementia experts say there's not enough data yet to prescribe exercise to prevent memory loss. It's also too soon to say whether exercise may prevent dementia or simply delay it in people who would eventually develop it anyway. But when it comes to Alzheimer's, even a short delay could mean great gains in quality of life.

  这些发现与以前的研究一致,把体育运动与大脑功能联系起来。但老年痴呆症专家说,还没有充足的数据来规定,运动可以防止记忆力减退。运动是否能预防老年痴呆会或能减缓老年痴呆患者的症状,这些都还言之过早。但涉及到老年痴呆,即使是短暂的延迟也意味着生活质量大大的提高。

  以上就是新东方在线托福网为你带来的托福阅读精选练习素材:散步可以锻炼大脑,更多精彩敬请关注新东方在线托福网

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